Search Results for author: Kimberly Villalobos Carballo

Found 7 papers, 3 papers with code

Patient Outcome Predictions Improve Operations at a Large Hospital Network

no code implementations25 May 2023 Liangyuan Na, Kimberly Villalobos Carballo, Jean Pauphilet, Ali Haddad-Sisakht, Daniel Kombert, Melissa Boisjoli-Langlois, Andrew Castiglione, Maram Khalifa, Pooja Hebbal, Barry Stein, Dimitris Bertsimas

Problem definition: Access to accurate predictions of patients' outcomes can enhance medical staff's decision-making, which ultimately benefits all stakeholders in the hospitals.

Decision Making

Multistage Stochastic Optimization via Kernels

no code implementations11 Mar 2023 Dimitris Bertsimas, Kimberly Villalobos Carballo

We prove that the proposed approach is asymptotically optimal for multistage stochastic optimization with side information.

Management Stochastic Optimization

TabText: A Flexible and Contextual Approach to Tabular Data Representation

no code implementations21 Jun 2022 Kimberly Villalobos Carballo, Liangyuan Na, Yu Ma, Léonard Boussioux, Cynthia Zeng, Luis R. Soenksen, Dimitris Bertsimas

We show that 1) applying our TabText framework enables the generation of high-performing and simple machine learning baseline models with minimal data pre-processing, and 2) augmenting pre-processed tabular data with TabText representations improves the average and worst-case AUC performance of standard machine learning models by as much as 6%.

Integrated multimodal artificial intelligence framework for healthcare applications

1 code implementation25 Feb 2022 Luis R. Soenksen, Yu Ma, Cynthia Zeng, Leonard D. J. Boussioux, Kimberly Villalobos Carballo, Liangyuan Na, Holly M. Wiberg, Michael L. Li, Ignacio Fuentes, Dimitris Bertsimas

The generalizable properties and flexibility of our Holistic AI in Medicine (HAIM) framework could offer a promising pathway for future multimodal predictive systems in clinical and operational healthcare settings.

Time Series Analysis

Robust Upper Bounds for Adversarial Training

1 code implementation17 Dec 2021 Dimitris Bertsimas, Xavier Boix, Kimberly Villalobos Carballo, Dick den Hertog

We introduce a new approach to adversarial training by minimizing an upper bound of the adversarial loss that is based on a holistic expansion of the network instead of separate bounds for each layer.

Holistic Deep Learning

1 code implementation29 Oct 2021 Dimitris Bertsimas, Kimberly Villalobos Carballo, Léonard Boussioux, Michael Lingzhi Li, Alex Paskov, Ivan Paskov

This paper presents a novel holistic deep learning framework that simultaneously addresses the challenges of vulnerability to input perturbations, overparametrization, and performance instability from different train-validation splits.

Adversarial Robustness

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